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Every year, on the first day of school, the sixth grade teacher at Greenville Middle School asks his students to pick their favorite primary color: red, yellow, or blue. From years of experience, the teacher knows that only 1 in 7 students choose yellow and that about half of the students pick blue. What is the chance that a student picks red?
He then raised 10 to the power of the endpoints of the interval to get back to dollars. He claims that this is a 95% confidence interval for mean sales. What do you think?
r. Patton is a professor of English. Recently she counted the number of misspelled words in a group of student essays. She noted the distribution of misspelled words per essay followed the normal distribution with a standard deviation of 2.44 word..
a security analyst wishes to construct an index to reflect the changes in the price of five stocks in a certain
Assume that items produced are supposed to be normally distributed with mean 35 and standard deviation 3. To monitor this process, subgroups of size 5 are sampled.
Construct the 95% confidence interval for the proportion of students with at least one injury.
What value for the process mean will minimize the fraction defective? Please include the formula/steps taken to reach the answer.
Pareto charts. A large hospital was concerned about whether it was scheduling its operating rooms efficiently. Operating rooms lying idle may mean loss of potential revenue.
A test to see if U.S. cardinals are significantly younger than cardinals worldwide produces a P-value that is considerably greater than 0.05.
Find the equation of the regression line for the given data. The construct a scatter plot of the data and draw the regression line.
At the .10 significance level you will test to determine if there has been an increase in selling time. Is this a 1 or 2 tail test?
Cocoa and blood flow A study conducted by Norman Hollenberg, professor of medicine at Brigham and Women's Hospital and Harvard Medical School.
In this problem, we will analyze the profit found for sales of decorative tiles. A demand equation (sometimes called a demand curve) shows how much money people would pay for a product
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